I have a 2000' CC, SB, 4x4 with just over 101,000 on the odometer. About the time I pull into the driveway this afternoon I notice the "battery" light in the dash is on. Gauge still in the normal range, same place it always runs at. Should I just go to the local parts store and buy a new alternator? Or is their something I can check first or just take the truck somewhere and have it checked. I've only owned the truck since Aug. of last year and not exactly sure exactly where to start. On a gas motor I would just unhook the + side of the battery and check the voltage on the cable. Thanks for any ideas or advice.

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